From a pack of 52 cards, two cards are drawn together at random. What is the probability of both the cards being kings?
A. $$\frac{1}{15}$$
B. $$\frac{25}{57}$$
C. $$\frac{35}{256}$$
D. $$\frac{1}{221}$$
Answer: Option D
Solution(By Examveda Team)
Let S be the sample spaceThen,
$$n(S) = $$ $${}^{52}\mathop C\nolimits_2 = $$ $$\frac{{\left( {52 \times 51} \right)}}{{\left( {2 \times 1} \right)}}$$ =1326
Let E = event of getting 2 kings out of 4
∴ $$n(E) = {}^4\mathop C\nolimits_2 = $$ $$\frac{{\left( {4 \times 3} \right)}}{{\left( {2 \times 1} \right)}}$$ = 6
∴ $$P(E) = \frac{{n(E)}}{{n(S)}} = $$ $$\frac{6}{{1326}} = \frac{1}{{221}}$$
Related Questions on Probability
A. $$\frac{{1}}{{2}}$$
B. $$\frac{{2}}{{5}}$$
C. $$\frac{{8}}{{15}}$$
D. $$\frac{{9}}{{20}}$$
A. $$\frac{{10}}{{21}}$$
B. $$\frac{{11}}{{21}}$$
C. $$\frac{{2}}{{7}}$$
D. $$\frac{{5}}{{7}}$$
A. $$\frac{{1}}{{3}}$$
B. $$\frac{{3}}{{4}}$$
C. $$\frac{{7}}{{19}}$$
D. $$\frac{{8}}{{21}}$$
E. $$\frac{{9}}{{21}}$$
What is the probability of getting a sum 9 from two throws of a dice?
A. $$\frac{{1}}{{6}}$$
B. $$\frac{{1}}{{8}}$$
C. $$\frac{{1}}{{9}}$$
D. $$\frac{{1}}{{12}}$$
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